| Title | Coastal to offshore submarine channel sediment transport system: Savary Island, British Columbia, Canada |
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| Author | Barrie, J V ;
Conway, K W |
| Source | Geo-Marine Letters vol. 39, 6, 2019 p. 435-446, https://doi.org/10.1007/s00367-019-00602-1 |
| Image |  |
| Year | 2019 |
| Alt Series | Natural Resources Canada, Contribution Series 20200209 |
| Publisher | Springer |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | British Columbia |
| NTS | 92F/09; 92F/10; 92F/15; 92F/16 |
| Area | Savary Island |
| Lat/Long WENS | -124.9000 -124.7667 49.9833 49.9167 |
| Subjects | marine geology; Nature and Environment; Science and Technology; sedimentology; channel deposits; bathymetry; seismic data; marine sediment cores; cores; sediment transport; postglacial deposits;
Quaternary |
| Illustrations | location maps; bathymetric profiles; images; seismic reflection profiles; schematic diagrams; tables; photographs |
| Released | 2019 11 06 |
| Abstract | Multibeam bathymetry, coupled with seismic reflection profiles and sediment cores, was collected to understand the sediment process mechanisms for active onshore-offshore sediment transfer system from
coastal erosion to nearshore transfer of sediment into a submarine channel and fan system. Savary Island in the northern Salish Sea of British Columbia, Canada, emerged immediately after deglaciation and became exposed to winter storms that began a
continual modification of the island. Subsequent to coastal erosion, sediments are moved from the south side of the island, by strong tidal currents and longshore drift, to the island's north side. The mobilized sands are then entrained into and
swept down submarine channels during gravity flows, likely a response to enhanced hydrodynamic tidal flow. Downslope progradation within the channels is primarily a result of downslope migrating submarine dunes that transfer sand to small submarine
fans. Further transport beyond the channels into the deeper basin occurs via turbidity flows that have been active throughout the late Holocene. The prospect for Savary Island is grim, as this sediment transfer system will likely continue until the
island disappears altogether. |
| GEOSCAN ID | 326621 |
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